Factair F4500 Operating Manual page 13

The F4500 incorporates a unique flow checking
system to ensure that the air is passing through
all 4 outlet ports, thus eliminating the possibility
of a false positive result.
If this screen appears the system has detected a
fault on one of the outlets, it is possible that this
could be due to a low battery. Replace the
batteries and repeat the test, if the screen
reappears then the unit should be returned to
Factair for investigation.
Once the purge has finished, the Water (F4500
only), CO, CO and Draeger Impactor/oil tubes
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should be inserted into the test ports and
tightened firmly; ensure the Impactor has an
intact protective seal.
This seal must remain in place for the duration of
the test.
Press the button in top right hand corner to start
the test.
The test will now commence and the duration will
be displayed as a countdown, together with
pressure, flowrate, ambient temperature and
oxygen content.
During the test the flowmeter should be set to
simulate the requirements of the respiratory
protective device RPD.
The unit can be left until the test time has
elapsed.
F4500ED only
If the instrument detects that the dewpoint
meter's rate of change is still too high (>0.2°C per
minute) it will automatically continue the test
until this stabilises (maximum test time 15
minutes).
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